—Do you know the most ancient city in China—Xi’an well? —No,this is the first time I ________ here. A.came B.have been C.am coming D.come 答案:B5、 Ever driven into a traffic
jam just after the guy on the radio said the road was all clear? Or prepared
yourself for the crowdedness he warned about only to zip right through?
A large
number of private companies say they have the one thing that can ease such
frustrations: better information.
Now one
of those companies, SpeedInfo Inc., has fixed 50 solar--powered, wireless radar
sensors along main roads in the District of Columbia that take readings of
average traffic speeds twice a minute in both directions.
The
company says the sensors provide a far more accurate picture of road conditions
than can be collected from helicopters or highway patrol alerts.
In a
business model that SpeedInfo hopes will develope around the country, the San
Jose, California--based company is letting the city use the data for traffic
planning free of charge, in exchange for access to the side of the road.
Speedlnfo plans to sell the information to paying customers, including
broadcasters and companies that provide information for in--car navigation
equipment.
The problem with traditional traffic
reports is that in most of the country, they rely on highway patrol accident
reports that come 30 to 40 minutes late and a few helicopters that get into the
sky during rush hour, SpeedInfo Chief Executive Doug Finlay said.
"Chopper Bill gets in the sky and says, 'Oh, I'm looking at the road and
the cars are going slow, "' Finlay said. "Chopper Bill is the best
data you got."
Tim
Lomax, a researcher at the Texas Transportation Institute, said a recent
increase of high--tech traffic data systems is good for drivers.
"Even if it doesn't get rid of traffic crowdedness, they at least give
people an idea of what sort of choices they're facing and more control over
their destiny, which is part of the frustrating element of traffic crowdedness,"
Lomax said.
71. The author uses two questions
at the beginning of the passage for the purpose of____________
A. expecting
the readers'
reply
B. gathering readers' information
C. asking the
readers' for
help
D. introducing the theme
72. SpeedIn{o Inc. has fixed radar
sensors in Columbia____________
A. to provide
more accurate road conditions quickly
B. to have a
better idea of passers--byes privacy
C. to protect
the capital from being attacked
D. to keep an
eye on helicopters or highways
73. According to Tim Lomax,
____________
A. the
high--tech traffic data systems is of little use for traffic jam
B. the
Solar--powered sensors can get rid of all traffic problems
C. the system
can cause drivers to be more aware of road conditions
D. the
facilities can change a person's fortune in the near future
74. All the following are true
EXCEPT that____________
A. the city of
Washington uses the data for traffic planning for free
B. broadcasters
and companies get the information without pay
C. highway
patrol accident reports often come 30 to 40 minutes late
D. Finlay tries
to persuade people to use their collected data
75. The passage is mainly
concerned with____________
A. solar--powered
sensors that provide traffic data
B. Speedlnfo
Inc. that produces radar sensors
C. a business
model that will develope around U. S
D. the problem that
traditional traffic reports ever have